
Title 9083 / 9087 / 90A3 / 90A7
Learning Control Operator’s Manual
03 '00.06.07 N.Sonoda Qualified 2'nd issue Draw No.
02 ’99.01.14 K.Maeda Qualified 1’st issue
A - 63639E - 034
01 ’97.12.08 K.Maeda Newly designed Sheet 050
Edit Date Design Description / 070
(Note) Set for both Main and Sub axes.
Set zero in case of double coil tandem or the position tandem learning control.
Set a value that is as small as possible but greater than the static friction torque. A set preload
torque is applied to each motor at all times. So, set a value that does not exceed the rated static
torque of each motor. As a guideline, specify a value equal to one–third of the rated static torque.
As a preload torque is added in any case. So, set the preload torque directions as follows:
l When the rotation directions of the main axis and sub–axis are the same : Different signs
l
When the rotation directions of the main axis and sub–axis are different : Same sign
For the α22/3000 (Servo module SVM1–130) When a preload torque of 50 kgfcm is to be applied,
the torque constant is 7.0 kgfcm/Arms according to the specifications of the servo motor. So, the
peak value is 4.95 kgfcm/Ap. The torque is converted to a current value as follows: 50/4.95 = 10.1
Ap. The amplifier limit is 130 Ap, so that the value to be set is: 10.1/130 x 7282 = 566
So, set 566 for the main axis, and –566 for the sub–axis (when the directions of rotation of the two
motors are the same). When movement of the table is stopped, check whether the system is in
tension. If not, increase this value gradually.
(Note) Set only to Main axis.
Data range : 0 to 32767
Setting method : Kc x 32768 (0 < Kc <0.5)
(Note) Set only to Sub axis. Set zero usually
Regarding Preload and Damping compensation, and how to tune the Tandem, refer to
4.20 Tandem
control function
in “FANUC AC SERVO MOTOR α series Parameter manual” (B-65150E).
7.6.3 External signal interface
Supposing Main and Sub motors are ready to chuck the each edge of one work piece. Before chucking both
motor can be driven independently. When both motor connected by workpiece for the cutting, you send
Coupling flag to servo software through PMC in advance to enable “Sub axis separate function”, then G05
operation start Torque tandem Learning control. After cutting of G05 finished, Coupling flag allows the
independent drive of both motor. If you want Position tandem Learning control instead of Torque tandem, use
“Synchronous Learning function” instead of “Sub axis separate function”.
In addition, you should set Simple synchronous control (option) in order to use Coupling flag.
When you set bit in G139 corresponded with Sub axis, Coupling flag is sent to servo software.
Signal address (T-series, M-series)
You set No.8311 for the relation between Main and Sub axis. Refer to
1.6 Simple Synchronous control in
2036
Damping compensation Gain Kc
2036
Damping compensation phase coefficient α
G139
SYNx1
SYNx3
SYNx2SYNx5SYNx6SYNx7SYNx8 SYNx4
2087
Preload torque